Butterfly Monitoring Sites
North American Butterfly Monitoring ProjectButterfly Monitoring in the Netherlands
Monitoring Butterflies for Ecology and Conservation (Book)
Monitoring of Butterflies in SW Ukraine
Effectiveness Monitoring Protocol
Checklist and "Pollard Walk" Butterfly Survey Methods on Public Lands
General Lepidopteran Sites
The Lepidopterists' SocietyThe US Geological Survey's Butterflies of North America
North American Butterfly Association